The One™ Wireless Activity and Sleep Tracker (Black)

If you want to turn fitness into a lifestyle, the One by Fitbit is for you. During the day, it tracks your steps, distance, calories burned and stairs climbed. Come nightfall, it measures your sleep cycle, helps you learn how to sleep better and wakes you in the morning. The One motivates you to reach your goals by bringing greater fitness into your life - seamlessly, socially, 24 hours a day.